A STUDY ON A CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMN TO STEEL-BEAM CONNECTION REINFORCED WITH CASTING STEEL PARTS : Elasto-plastic behavior of local part of the connection

Abstract

To reduce fabrication time and labor, the authors have developed a concrete-filled square steel tubular column to a steel-beam connection reinforced with casting steel parts. To understand the elasto plastic behavior of local part of the connection, structural testing were carried out on local models of theconnection. The test results confirmed that the load-displacement relationship is influenced by the first veilded part of the connnection, but not by shape of the casting steel parts. Also the load-displacement relationships can be approximated by the analysis assuming tri-linear load-displacement relationships for the cast steel part, the steel tube, and split tee.